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Wacky axis movement
« on: November 05, 2011, 12:28:45 AM »
I fire up my router and do a ref all everything appears normal.

I jog an axis one inch and the spindle moves one inch. 

BUT, if I load a file then all three DROs move to a seemingly random location.  If I then move the spindle 1 or 2 inches the DRO only moves by some small amount, say .06 or something.

So if I try to move the Z axis 4 or 5 inches the Z hits the stop long before the Z axis DRO gets to 0.75in.

Anyone have any clues??

Thanks,
Don

Offline Tweakie.CNC

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Re: Wacky axis movement
« Reply #1 on: November 05, 2011, 03:37:34 AM »
Have you checked your native units are set to inches (assuming you are working in inches) ??
Is the GCode file you are loading using inch units ??

Tweakie.
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Re: Wacky axis movement
« Reply #2 on: November 05, 2011, 09:03:10 AM »
Yes. That is one of the first things I thought of too.  But, the movement of the DRO has no relation to the movement of an axis.

Inches or MM makes no difference

Thanks for looking,
Don

Offline Tweakie.CNC

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Re: Wacky axis movement
« Reply #3 on: November 05, 2011, 09:50:24 AM »
Quote
BUT, if I load a file then all three DROs move to a seemingly random location.  If I then move the spindle 1 or 2 inches the DRO only moves by some small amount, say .06 or something.

Don,

What file are you loading ??
Does this happen with any file ??

Tweakie.
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Offline ger21

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Re: Wacky axis movement
« Reply #4 on: November 05, 2011, 11:45:34 AM »
This sounds like your native units are mm and your loading a file with G20 in it.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Wacky axis movement
« Reply #5 on: November 05, 2011, 12:37:27 PM »
Units don't matter. The movement of the DRO doesn't relate to the movement of the spindle.  Large movement of the spindle small change in DRO.

I tried a couple different files with same result.


Don

Offline ger21

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Re: Wacky axis movement
« Reply #6 on: November 05, 2011, 12:56:31 PM »
Does your g-code have a G21 in it? I'm pretty sure it's a units issue. Probably opposite what I said before. Machine set up in inches, and running a file in mm's.
Gerry

2010 Screenset
http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
http://www.g-forcecnc.com/jointcam.html
Re: Wacky axis movement
« Reply #7 on: November 05, 2011, 02:27:07 PM »
Gerry I have G20 in my Mach init string.

How do I check my native units?  This is a new machine (K2CNC).  The only software I received was the Mach profile.
Re: Wacky axis movement
« Reply #8 on: November 05, 2011, 02:29:24 PM »
>>How do I check my native units

Never mind I found it in motor tuning.
Re: Wacky axis movement
« Reply #9 on: November 05, 2011, 09:57:43 PM »
Does your g-code have a G21 in it? I'm pretty sure it's a units issue. Probably opposite what I said before. Machine set up in inches, and running a file in mm's.

Gerry you and Tweakie are right!

My machine was motor tune in MM... If I put a G21 in my code I can run my files:)

What do I need to be aware of to change the motor tuning to inches??

Thanks for your quick help!

Don